/**
 * Copyright (C) 2013 DaiKit.com - daikit4gxt-sample module (admin@daikit.com)
 *
 *         Project home : http://code.daikit.com/commons
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.daikit.daikit4gxtsample.server.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Component;


/**
 * A Request filter to set in order to access easily current {@link HttpServletRequest} and {@link HttpServletResponse}
 * in {@link Registry}
 * 
 * @author tcaselli
 * @version $Revision$ Last modifier: $Author$ Last commit: $Date$
 */
@Component(value = "commonRequestFilter")
public class CommonRequestFilter implements Filter
{

	@Override
	public void destroy()
	{
		Registry._setRequest(null);
		Registry._setResponse(null);
	}

	@Override
	public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chainFilter)
			throws IOException, ServletException
	{
		Registry._setRequest((HttpServletRequest) request);
		Registry._setResponse((HttpServletResponse) response);
		chainFilter.doFilter(request, response);
		Registry._setRequest(null);
		Registry._setResponse(null);
	}

	@Override
	public void init(final FilterConfig filterConfig) throws ServletException
	{
		// Nothing to be initialized
	}

}
